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ACS Appl Mater Interfaces

Title:		Facet-Controlled Synthesis of CeO(2) Nanoparticles for High-Performance CeO(2) Nanoparticle/SnO(2) Nanosheet Hybrid Gas Sensors
Author(s):		Ema T; Choi PG; Takami S; Masuda Y;
Address:		"Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. National Institute of Advanced Industrial Science and Technology (AIST), 4-205 Sakurazaka, Moriyama, Nagoya 463-8560, Japan"
Journal Title:		ACS Appl Mater Interfaces
Year:		2022
Volume:		20221215
Issue:		51
Page Number:		56998 - 57007
DOI:		10.1021/acsami.2c17444
ISSN/ISBN:		1944-8252 (Electronic) 1944-8244 (Print) 1944-8244 (Linking)
Abstract:		"CeO(2) nanocubes with metastable 100 facets and CeO(2) nanooctahedrons with the most stable 111 facets are herein fabricated by controlling the morphology and facets of CeO(2) nanoparticles. SnO(2) nanosheet-based assembled films coated with these CeO(2) nanocubes or CeO(2) nanooctahedrons yield 100 CeO(2) nanocubes/SnO(2) nanosheets and 111 CeO(2) nanooctahedron/SnO(2) nanosheet hybrid gas sensors, respectively. The hybrid sensors with CeO(2) nanoparticles exhibited enhanced sensing responses to numerous chemical species relative to a pristine SnO(2) nanosheet gas sensor, including acetone, hydrogen, ethanol, ammonia, acetaldehyde, and allyl mercaptan. In particular, the responses of 100 CeO(2) nanocubes/SnO(2) nanosheets and 111 CeO(2) nanooctahedron/SnO(2) nanosheet gas sensors to acetone or allyl mercaptan were 6.8 and 10.3 times higher, respectively, than that of the pristine SnO(2) nanosheet gas sensor. Furthermore, the sensor response to ammonia was 2.5 times higher than that of a commercial volatile organic compound (VOC) gas sensor (TGS2602, Figaro Engineering Inc.). The CeO(2) nanocube-based sensor with exposed metastable 100 facets promotes the adsorption and oxidation of VOCs owing to the higher surface energy of the metastable 100 facets and therefore exhibits a higher sensing performance than the CeO(2) nanooctahedron-based sensor with an exposed 111 facet. The developed sensors show excellent potential for the detection of gas markers in human breath and perspiration for disease diagnosis"
Keywords:		CeO2 nanocube CeO2 nanooctahedron SnO2 nanosheet facet control gas sensor;
Notes:		"PubMed-not-MEDLINEEma, Takuma Choi, Pil Gyu Takami, Seiichi Masuda, Yoshitake eng 2022/12/16 ACS Appl Mater Interfaces. 2022 Dec 28; 14(51):56998-57007. doi: 10.1021/acsami.2c17444. Epub 2022 Dec 15"